I have a few systems on a domain. We have to give the users local (not domain) admin rights so they can install applications when needed. This has not been a problem on any of the machines but one. All I've had to do is log into the workstation under the local admin account and add the domain user account to the local admins group. I'm required to authenticate with the domain admin account and it completes. On this problem machine, when I try to add the user to the admin group, I'm only offered the local machine as a location from which to pull users. Even when I type in firstname.lastname@example.org to add them, the machine kicks it back and says that this isn't recognized.
The XP box is running SP2, and is member of a Windows 2003 domain. Thank you.